/Engine/Source/Runtime/SlateCore/Public/Widgets/SWidget.h
Tests if an arranged widget should be culled.
bool IsChildWidgetCulled ( const [FSlateRect](API\Runtime\SlateCore\Layout\FSlateRect) & MyCullingRect, const [FArrangedWidget](API\Runtime\SlateCore\Layout\FArrangedWidget) & ArrangedChild ) const